Eraser cleaning appliance



Sept. 1931- CHAMBERS ET AL 1,323,378

ERASER CLEANING APPLIANCE Filed May 21, 1929 2 Sheets-Sheet 1 Q In venior lwale [7aam eras A itorneu p 22, 9 L. CHAMBERS ET AL 1,323,878

ERASER CLEANING APPLIANCE Filed May 21, 1929 2 Sheets-Sheet 2 Inventor jlazle fawens; I0/2/ M21195 fiawievas A iiorney Patented Sept. 22, 1931 were STATES- PATENT "caries..

LUcILE CHAMBERS AND JoHN CHARLES CHAMBERS, or SAN rnnnorsoo, CALIFORNIA ERASERCLEALTING APPLIANCE Application and May 21,

This invention relates to oflice equipments in general and has more particular reference to atypewriter accessory which may be deli-- nitely entitled an eraser cleaner.

Moreprecisely stated we have developed a simple and economical device which may be conveniently used bytypists, in conveniently cleaning and maintaining an eraser in good condition to promote clean work and to obviate the crude method of attempting to maintain the peripheral edge of the eraser clean by rubbing it on scratch paper, as is now the common method.

Briefiystated, the invention is carried into 35 eflect by provision of a simplified stand equipped with a rotary abrasive wheel especially constructed for cooperation with the eraser, said stand being further provided with conveniently operable means for holding the eraser in contact with the wheel while the eraser is being reconditioned. A

The object and advantages derived from this novel contribution tothe art will become more readily apparent from the following .25 description and drawings.

In the drawings:

Figure 1 is a side elevational View of the complete accessory showing the manner in which the eraser is held in place for cleaning.

Figure 2 is a front view of the same observing the structure seen in Figure 1 in a direction from left to right.

Figure 3 is an enlarged fragmentary view in section and elevation showing the relationship and construction of parts more plainly.

Figure 4 is a top plan View of the eraser holding or retaining means.

Figure 5 is a top plan view of the eraser spindle.

As seen in Figure 1 the reference character 6 designates generally a miniature stand having an appropriate attaching base 7 and a vertical standard 8. This standard is formedirr termediate its ends with a horizontally elongated bearing 9, and above the bearing the upper end is bifurcated, the furcations being designated by the reference character 10. These furcations are apertured to accommodate a horizontal pivot bolt 11. Two parts 1929. Serial No. assess.

constituting a complete unit are fulcrumed or pivoted on this bolt. One part constitutes an arcuate arm 12 so shaped as to permit the free end portion 13110 be moved to a position to hold the eraser 14 in operative position. This portion 13 is shaped to provide a finger piece. On the under side of the arm is a grooved block 15 for cooperation with the edge of the. eraser. ;This is of hard rubber made in the formof an abrasive. The arm 12 is provided adjacent its pivoted end with a keeper 16 in which the free end portion of theflat spring 17 is arranged. The opposite end of the spring is anchored as at 18 on the standard below the pivot. Mounted on the same pivot is a stub shaft 19 whose free end terminates in a spindle 20 over which the hub portion of the eraser is slipped.

A crankshaft 21is mounted for rotation in the bearing 9. At one end is a shoulder forming collar 22 resting against the adjacent end of the bearing. Beyond this is a flat spaced portion 23 and then a reduced screwthreaded extremity 24 carrying a retaining nut .25 for the main rotary abrasive wheel 26. This wheel is formed with a peripheral grove 27 for reception of the eraser 14 as seen in the drawings. The opposite end portion of the shaft 21 is flat faced as at 28 and screw threaded at 29 to accomodate a retaining nut 30 for the crank handle 31. This permitsthe shaft 21 and its appurtenances to be rotat'ed-as a unit. 7

As before stated, the purpose of the invention'is to clean a typewriter eraser, but it may be utilized to clean'any other type of eraser for either pencil, ink, etc. The. result may be accomplished thoroughly in a short space of time through the, medium of an unusually simpledevice. In the block type of eraser it isunderstood that the finger pressed retaining device is not used. To accomplish this result simply hold the eraser on the main cleaner wheel and turn the crank handle. For the type of eraser shownin the drawings simplv slip the eraser over the spindle and use the thumb. attachment to bring the eraser into place. Then turn the handle with th right hand and regulate the. cleaning process by pressure applied on the thumb has piece 13. Two turns will be sufiicient to clean the eraser.

to an out of the way position. Thecomplementary lugs 32 and 33 on the pivoted ends of the parts 12 and 19 will cause them to move avvay'from the roller 26 as a unit under the action of the fiat spring 17. l I

This accessory it is believed is a novel and original contribution to the art, and is such as to fulfill the requirements of" a. device of this class, and in a highly satisfactory manner. The simplicity is such as to make it unnecessary to enter into a more detailed explanation.

Minor changes in shape, size, materials and. rearrangementof details may be resorted to in actual practice so long as no departures are made from the accompanying-claims.

Having thus described the invention, what we claim as new and desire tosecure by Letters Patent is 1; As a new product of manufacture, an oflice accessory of the classdescribed comprising a support a shaft mounted for rota tion on said support, a grooved abrasive wheel carried by saidshaft, an arm p-lvotally mounted on theup-per end of the support and adapted to swing over the wheel, a spring for moving the arm out of the way, said arm being formed with a finger piece and with agblocl; having its groove for cooperation with the adjacent edge portion of the eraser, said block being adapted to be located in alinement with the peripheral portion of'said wheel, together with a stub shaft associated with said arm and adapted to be disposed: in spaced parallelism with said first named shaft, said stub shaft being provided with a terminal spindle for reception of the hub portion of the eraser. i

2. As a new product of manufacture, an office accessory of the class describe-d com-- prising a support, a shaft mounted for rotation on said support, a grooved abrasive wheel carried by said shaft, an arm pivotally mounted on the upper end of the support adapted to swing over the grooved periphery of said wheel, aspring for moving the arm to an out of the way position, said arm terminating in a finger grip and beingprovidedawitha block having a groove for cooperation with'the adjacent edge portion of the eraser, said block being adapted. to be located in alignment with the peripheral portion of said wheel, and means forrsupporting the eraser between the grooved portions of said wheel and block.

3. As a new product of manufacture, an oflice accessory of the character described comprising a rigid columnar support having a laterally projecting shaft mounted for rotation on said support and said shaft rotated by a crank, a. grooved abrasive wheel carried by said shaft atthe end opposite the Then take the thumb off of the retainer and the spring will pull the retainer crank end of said shaft, an arm pivotally mounted at the upper end of the support and adapted to swing over the grooved periphery of said wheel, a contour conforming spring cooperating with the pivotally mounted arm at the upper end of the support for holding said arm out of operative position, said arm terminating in a finger grip and. being provided wi; 11 a block of abrasive material having a groove for cooperation with an adjacent edge portion of the eraser, said block beingadapted to be located above and in alignment with the peripheral portion of said wheel, andrmeans for supporting an eraser rotatably between the grooved portion of said wheel and the, block.

4. As a new product of. manufacture, an office accessory of the character described comprising a support, ashaft mounted for rotation on said support, a grooved abrasive wheel carried by said. shaft, aniarm pivotally mounted on the upper end of the support and adapted to swing over the wheel, a spring for moving the arm out of the way, said arm being formed witha finger piece'and with a block having a groove for cooperation with the adjacent edge portion of the eraser,

said block being adapted to be located in alignment with the peripheral portion of said wheel, together with a stub-shaft associated with said arm andadapted to be disposed in spaced parallelism with said first named shaft, said stub-shaftv being provided with a terminal spindle for reception of the top portion of the eraser, said. terminal spindle having a. means for cooperation with,

the pivoted arm whereby said terminal. spindle is caused to swing In unison with the upper arm when the said upper arm is moved in and out of position.

In testimony whereof we affix our signatures.

LUCILE CHAMBERS. JOHN CHARLES CHAMBERS.v 

